Gardner's "Years Best" anthologies were always the best of the best. I bought one every year.
Here's the last one. Just released: https://www.amazon.com/dp/125016463X/?tag=id2100-20
I noticed there's a "best of the best" coming out early next year: https://www.amazon.co.uk/dp/B07D2BGWRF/?tag=brite-21